Claw material

Abstract

The present invention aims to develop a nail care product that excels in oil resistance of the cosmetic film, nail surface irregularity correction effect, smooth spreadability, and rapid film formation. [Solution] The following components (A) to (C); (A) Certain polyorganosiloxanes (B) Volatile oils with a molecular weight of 300 or less (C) Organically modified clay minerals A nail care product containing [specific ingredient].

Description

[Technical Field]

[0001] The present invention relates to a nail beautifying agent, and more specifically, to a nail beautifying agent containing a specific polyorganosiloxane, a specific volatile oil, and an organically modified clay mineral, which has a smooth spreadability upon application, excellent film formation speed, and also possesses excellent nail surface irregularity correction and oil resistance. [Background technology]

[0002] For nail care products, smooth application, rapid film formation, and excellent nail surface correction are crucial factors. Furthermore, in recent years, with increased emphasis on hand and nail hydration, high oil resistance—the ability to maintain the makeup film even when using hand oils and other oily products—is also required. Examples of highly oil-resistant nail care products include those using UV-curing resins and nitrocellulose. However, gel nails using UV-curing resins are difficult to handle at home and require professional removal. On the other hand, nail care products using nitrocellulose have a slow film formation rate, requiring care to avoid damaging the nails until the coating is fully formed. Additionally, they are not very smooth to apply evenly, which may result in a lack of nail surface correction.

[0003] Therefore, various studies have been conducted to achieve a balance between smooth spreadability, rapid film formation, and nail surface irregularity correction effect. For example, Patent Document 1 discloses a nail care product containing a non-aqueous polymer dispersion in which a polymer is dispersed in nitrocellulose, a solvent, and a volatile silicone. However, Patent Document 1 does not adequately address the nail surface irregularity correction effect, and oil resistance was not discussed. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2000-204021 [Overview of the project] [Problems that the invention aims to solve]

[0005] Therefore, the main objective of the present invention is to provide a nail beautifying agent that has a smooth spreadability when applied, excellent film formation speed, and also has excellent nail surface irregularity correction and oil resistance. [Means for solving the problem]

[0006] In view of the above circumstances, the inventors conducted diligent research and, as a result, discovered a nail beautifying agent that combines a polyorganosiloxane having a specific structure, a volatile oil with a molecular weight of 300 or less, and an organically modified clay mineral. This agent exhibits smooth application, excellent film formation speed, and superior nail surface irregularity correction and oil resistance.

[0007] In other words, the present invention is as described below. [1] The following components (A) to (C); (A) A polyorganosiloxane having a block structure, represented by the following general formula (1), having a weight-average molecular weight of 500,000 or more, and being a solid at room temperature in the absence of solvent with a softening point of 50°C or higher. [ka] (In the formula, R 1 , R 2 , R 3 , R 4 , R 5 is a saturated or unsaturated hydrocarbon group having 1 to 20 carbon atoms, which may have hydrogen atoms or substituents; m represents the number of repeating diorganosiloxy units, where 50≧m≧0; a, b, c, d, and e represent the molar ratios of their respective siloxane units, where 0.3≧a≧0, 0.2≧b>0, 0.5≧c≧0, 0.95≧d>0.5, 0.3≧e≧0, and a+b×(2+m)+c+d+e=1; and x and y represent the number of hydroxyl or alkoxy groups bonded to 1 mole of Si atoms in the siloxane units a-e, where 0.1≧x>0 and 0.1≧y>0. (B) Volatile oils with a molecular weight of 300 or less (C) Organically modified clay minerals A nail care product containing [specific ingredient]. 〔2〕The mass ratio (A) / (B) of the content of the component (A) to the content of the component (B) is 0.005 to 0.2, and the nail cosmetic according to 〔1〕. 〔3〕The mass ratio (A) / (C) of the content of the component (A) to the content of the component (C) is 0.04 to 2, and the nail cosmetic according to 〔1〕 or 〔2〕. 〔4〕The component (B) is a volatile oil agent having a molecular weight of 180 or less, and the nail cosmetic according to 〔1〕 or 〔2〕. 〔5〕The nail cosmetic according to 〔1〕 or 〔2〕 further contains a component (D) nitrocellulose. 〔6〕The mass ratio (A) / (D) of the content of the component (A) to the content of the component (D) is 0.033 to 0.83, and the nail cosmetic according to 〔5〕.

Advantages of the Invention

[0008] According to the present invention, it is possible to provide a nail cosmetic that has a smooth spread, is excellent in the speed of film formation, and has an excellent nail unevenness correction effect and oil resistance.

Embodiments for Carrying Out the Invention

[0009] Preferred embodiments of the present invention will be described in detail. However, the present invention is not limited to the following preferred embodiments and can be freely changed within the scope of the present invention. In this specification, percentages are by mass unless otherwise specified. Also, in this specification, "X to Y" indicating a range includes X and Y and means "X or more and Y or less", and the upper limit value (hereinafter) and the lower limit value (above) of each numerical range (~) can be arbitrarily combined as desired. Generally, a silicone resin is composed of M units (R3SiO1 / 2), D units (R2SiO2 / 2), T units (RSiO3 / 2), and Q units (SiO4 / 2) (R is an organic group such as an alkyl group or a phenyl group). In this specification, "DT resin" means a polyorganosiloxane composed of D units and T units. "MDT resin" means a polyorganosiloxane composed of M units, D units, and T units.

[0010] The weight-average molecular weight in the present invention is a value obtained by converting polystyrene with a known molecular weight as a standard substance by gel permeation chromatography (GPC) measured under the conditions shown below. [Measurement conditions] Flow rate: 0.5 mL / min Detector: Differential refractive index detector (RI) Column: The following two columns are connected in series and used. TSKgel GMHHR-H(30)(7.8 mm I.D.×30 cm×1)(manufactured by Tosoh Corporation) Column temperature: 40 °C Sample injection volume: 200 μL (THF solution with a concentration of 20 g / L)

[0011] Component (A) used in the present invention is a polyorganosiloxane having a block structure represented by the following formula (1), characterized in that the weight-average molecular weight is 500,000 or more, the property at room temperature in a solvent-free state is solid, and the softening point is 50 °C or more (hereinafter, also referred to as "polyorganosiloxane having a block structure").

[0012]

Chemical formula

[0013] In the formula, R 1 , R 2 , R 3 , R 4 , R 5 is a hydrogen atom or a saturated or unsaturated hydrocarbon group having 1 to 20 carbon atoms which may have a substituent, m represents the repeating number of diorganosiloxy units, 50 ≥ m ≥ 0, a, b, c, d, e represent the molar ratios of the respective siloxane units present, 0.3 ≥ a ≥ 0, 0.2 ≥ b > 0, 0.5 ≥ c ≥ 0, 0.95 ≥ d > 0.5, 0.3 ≥ e ≥ 0, a + b×(2 + m) + c + d + e = 1, x, y are the numbers of hydroxy groups or alkoxy groups bonded to 1 mole of Si atoms of the siloxane units of a to e above, and 0.1 ≥ x > 0, 0.1 ≥ y > 0 are represented.

[0014] R 1 , R2 , R 3 , R 4 , R 5 Each of these is a saturated or unsaturated hydrocarbon group having 1 to 20 carbon atoms, which may independently have a hydrogen atom or substituents. From the viewpoint of oil resistance and film formation speed, it is preferably a saturated or unsaturated hydrocarbon group having 1 to 10 carbon atoms. Specific examples of these include, from the viewpoint of oil resistance and film formation speed, methyl group, chloromethyl group, methoxymethyl group, ethyl group, ethoxyethyl group, vinyl group, propyl group, (meth)acryloxypropyl group, mercaptopropyl group, chloropropyl group, glycidyloxypropyl group, epoxycyclohexylethyl group, allyl group, butyl group, pentyl group, cyclopentyl group, hexyl group, hexenyl group, cyclohexyl group, phenyl group, heptyl group, octyl group, octylenyl group, (meth)acryloxyoctyl group, mercaptooctyl group, chlorooctyl group, glycidyloxyoctyl group, decyl group, etc., but among these, R 1 , R 2 , R 3 , R 4 For this, methyl groups, ethyl groups, propyl groups, and phenyl groups are preferred, methyl groups and ethyl groups are more preferred, and methyl groups are even more preferred. 5 Regarding this, from the viewpoint of oil resistance and film formation speed, saturated hydrocarbon groups having 1 to 4 carbon atoms are preferred, methyl, ethyl, n-propyl, i-propyl, n-butyl, s-butyl, i-butyl, and t-butyl groups are more preferred, and n-butyl, s-butyl, and i-butyl groups are even more preferred.

[0015] a, b, c, d, and e represent the molar ratios of each siloxane unit, with 0.3≧a≧0, 0.2≧b>0, 0.5≧c≧0, 0.95≧d>0.5, 0.3≧e≧0, and a+b×(2+m)+c+d+e=1. x and y represent the number of hydroxyl groups or alkoxy groups bonded to 1 mole of Si atoms in the siloxane units a-e, with 0.1≧x>0 and 0.1≧y>0.

[0016] With respect to the hydroxyl or alkoxy groups bonded to the Si atoms of a polydiorganosiloxane having a block structure, it is preferable that x and y are 0.05≧x>0 and 0.05≧y>0, respectively, from the viewpoint of oil resistance and film formation speed.

[0017] Regarding the ratio of siloxane units in the polydiorganosiloxane having the block structure of the present invention, it is preferable that 40>m>10, 0.1≧a>0, 0.2≧b>0, 0.3≧c>0, and 0.05≧e≧0 are met from the viewpoint of oil resistance and film formation speed. Furthermore, in addition to the above, it is even more preferable that 0.9≧d>0.7 is met from the viewpoint of oil resistance and film formation speed.

[0018] The polydiorganosiloxane having a block structure has a weight-average molecular weight of 500,000 or more, preferably 1,000,000 or more, and more preferably 2,000,000 or more, from the viewpoint of oil resistance and film formation speed. There is no particular upper limit to the weight-average molecular weight, but from the viewpoint of oil resistance and film formation speed, for example, a weight-average molecular weight of 16,000,000 or less is preferred, more preferably 10,000,000 or less, and still preferred 8,000,000 or less. The range is preferably 500,000 to 16,000,000, more preferably 1,000,000 to 10,000,000, and still preferred 2,000,000 to 8,000,000. Within this range, it is more preferable from the viewpoint of oil resistance and film formation speed.

[0019] Polydiorganosiloxanes having a block structure are preferably introduced with a linear polydiorganosiloxane structure from the viewpoint of oil resistance and film formation speed. As an indicator of the state in which such a structure is introduced while being maintained 29 One method is signal analysis by Si-NMR, specifically, it is possible to distinguish by detecting signals attributed to polydiorganosiloxanes that fall within a predetermined range of chemical shifts. Generally, they are detected in the range of -10 to -50 ppm, but the polydiorganosiloxanes having a block structure contained in the cosmetic composition of the present invention are 29The present invention is characterized in that the chemical shift of the signal attributed to the diorganosiloxane unit in Si-NMR is detected in the range of -15 to -25 ppm, and the detection width of the signal peak (the difference between the chemical shift at the detection start point and the chemical shift at the detection end point) is 3 to 7 ppm. The narrower the detection width of the signal peak, the more it indicates that the linear siloxane structure is maintained while being introduced into the polymer. If the detection width is greater than 10 ppm, it means that the linear structure is practically not included in the polymer, making it difficult to obtain the desired coating film properties. In the present invention, 29 Si-NMR was performed using a 300MHz-NMR spectrometer manufactured by JEOL Ltd., and a solution sample with a sample concentration of 20 wt% was measured under conditions of 25°C.

[0020] The composition obtained by dissolving the polyorganosiloxane having the block structure of the present invention in an organic solvent is characterized by the fact that the pH of the extracted water is acidic, ranging from 3.5 to 6. Generally, it is known that the pH of the extracted water obtained by dissolving polyorganosiloxane in an organic solvent is neutral unless the solvent itself is acidic or basic. By controlling the pH within the aforementioned range, it is possible to obtain a stable solution without causing gelation or other problems over a long period of time, even with high molecular weight polyorganosiloxanes like those of the present invention. Such control of the extracted water pH can be achieved by using acids or buffers, but from the viewpoint of oil resistance and film formation speed, it is preferable to incorporate an acid, and more preferably an organic carboxylic acid.

[0021] Examples of acids include inorganic acids such as hydrochloric acid, nitric acid, and sulfuric acid, as well as organic carboxylic acids such as formic acid, acetic acid, propionic acid, citric acid, succinic acid, maleic acid, methanesulfonic acid, and trifluoromethanesulfonic acid, but are not limited to those exemplified here.

[0022] In compositions in which the polyorganosiloxane having the block structure of the present invention is dissolved in an organic solvent, it is preferable that the organic solvent is not an aromatic hydrocarbon, from the viewpoint of oil resistance and film formation speed. This is because aromatic hydrocarbons, such as benzene, toluene, and xylene, are organic solvents with a high environmental impact.

[0023] The polyorganosiloxane having a block structure contained in the cosmetic composition of the present invention can be produced, for example, by the following steps 1 to 3. Step 1: Silane monomers capable of constituting the siloxane unit of formula (1) above, having a chlorosilyl group or an alkoxysilyl group having 1-2 carbon atoms as a hydrolyzable group, and polydiorgannosiloxanes having hydrolyzable silyl groups at both ends are added dropwise to a mixed medium layer consisting of water, a hydrophilic organic solvent with a water solubility of 50-1000 g / L at 25°C, and a hydrophobic organic solvent with a water solubility of 1 g / L or less at 25°C, and undergo hydrolysis and condensation. Step 2: After removing the generated hydrogen chloride and alcohol, condensation polymerization is carried out under strongly acidic conditions with a pH of 3 or less until the weight-average molecular weight reaches 500,000 or more. Step 3: Neutralize or remove the acid and adjust the pH of the extracted water to 3.5-6.

[0024] Examples of hydrophilic organic solvents with a water solubility of 50 to 1000 g / L at 25°C include alcohols, ketones, esters, and ether compounds. Specifically, examples include n-propanol, isopropanol, n-butanol, secondary butanol, isobutanol, tertiary butanol, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, methyl ethyl ketone, and cyclohexanone. Among these, n-propanol, isopropanol, n-butanol, and isobutanol are preferred from the viewpoint of controlling the reaction during hydrolysis condensation and suppressing the formation of insoluble substances.

[0025] Examples of hydrophobic organic solvents with a water solubility of 1 g / L or less at 25°C include aliphatic hydrocarbon solvents such as hexane, heptane, octane, cyclohexane, methylcyclohexane, ethylcyclohexane, decane, isododecane, and isoparaffin compounds derived from olefin gases, as well as aromatic hydrocarbon solvents such as toluene and xylene. Among these, hexane, heptane, octane, cyclohexane, methylcyclohexane, ethylcyclohexane, and isododecane are preferred from the viewpoint of reaction control during hydrolysis condensation, maintenance of block structure, and solubility of the resulting resin. More preferably, hexane, heptane, ethylcyclohexane, and isododecane are preferred.

[0026] The preferred weight ratio of a mixed medium consisting of water, a hydrophilic organic solvent with a water solubility of 50 to 1000 g / L at 25°C, and a hydrophobic organic solvent with a water solubility of 1 g / L or less at 25°C is 10 to 30 parts hydrophilic organic solvent and 10 to 30 parts hydrophobic organic solvent, with water being 100 parts. Exceeding this upper limit will reduce productivity because it will require using more organic solvent than necessary. On the other hand, if it falls below this lower limit, it will be difficult to control the reaction during hydrolysis condensation, and solvent-insoluble substances will be generated.

[0027] As the silane and siloxane materials to be hydrolyzed and condensed, it is preferable to use silane monomers that can constitute the siloxane unit of formula (1) having a chlorosilyl group or an alkoxysilyl group having 1 to 2 carbon atoms as a hydrolyzable group, and polydiorganosiloxanes having hydrolyzable silyl groups at both ends. In particular, for polydiorganosiloxanes having hydrolyzable silyl groups at both ends, α,ω-dimethylchlorosiloxypolydimethylsiloxane, shown in formula (2) below, is preferred from the viewpoint of reactivity during hydrolysis. Furthermore, regarding the silane monomer, it is more preferable from the viewpoint of reaction control and production efficiency that the compound has only a chlorosilyl group as a hydrolyzable group.

[0028] [ka] (In the equation, 50 ≥ m ≥ 0.)

[0029] During the hydrolysis condensation reaction, the weight concentration of the reactive silane and siloxane material is preferably 10-30% by weight relative to the total amount of the mixed medium including water and the reactive silane and siloxane material. Exceeding this upper limit makes it difficult to control the reaction during hydrolysis condensation, and solvent-insoluble substances are generated. On the other hand, below this lower limit is undesirable because it requires the use of more organic solvent than necessary, resulting in reduced productivity.

[0030] The temperature during the hydrolysis condensation reaction is preferably between 0 and 40°C. If the temperature is higher than 40°C, it becomes difficult to control the reaction during hydrolysis condensation, and there is a risk of generating solvent-insoluble substances. If the temperature is below 0°C, the aforementioned reaction control effect becomes excessive, and it becomes inefficient in terms of the cooling energy required for temperature control.

[0031] In a method for producing polyorganosiloxanes having a block structure, after removing the generated hydrogen chloride and alcohol, condensation polymerization is carried out under strongly acidic conditions with a pH of 3 or less until the weight-average molecular weight reaches 500,000 or more. From the viewpoint of reaction control, the reaction temperature is preferably in the range of 10 to 80°C. Furthermore, from the viewpoint of reaction control, the pH is preferably in the range of 1 to 3. If the reaction temperature is higher than the upper limit of the range and the pH is lower than the lower limit of the range, the condensation polymerization proceeds excessively quickly and becomes difficult to control. On the other hand, if the reaction temperature is lower than the lower limit of the range and the pH is higher than the upper limit, the polymerization rate decreases significantly, and productivity deteriorates.

[0032] The content of component (A) used in the present invention, relative to the total amount of the nail polish, is preferably 0.2% or more, more preferably 0.6% or more, and even more preferably 1.5% or more, from the viewpoint of oil resistance and film formation speed. The upper limit is preferably 5% or less, more preferably 3% or less, and even more preferably 2.5% or less. The range is preferably 0.2 to 5%, more preferably 0.6 to 3%, and even more preferably 1.5 to 2.5%, from the viewpoint of oil resistance and film formation speed.

[0033] Component (B) used in the present invention is a volatile oil with a molecular weight of 300 or less. In the present invention, "volatile oil" means a substance that is liquid and volatile at 25°C and atmospheric pressure. Component (B) is not particularly limited as long as it is commonly used in cosmetics and quasi-drugs. For example, one or more selected from silicone oils, ester oils, ketones, hydrocarbon oils, etc., can be used. Examples of silicone oils include methyl trimethicone (molecular weight 270) and octamethylcyclotetrasiloxane (molecular weight 297). Examples of ester oils include ethyl acetate (molecular weight 88), butyl acetate (molecular weight 116), and propyl acetate (molecular weight 102). Examples of ketones include methyl ketone (molecular weight 72) and acetone (molecular weight 58). Examples of hydrocarbon oils include hydrocarbon oils having 6 to 18 carbon atoms, such as n-hexane (molecular weight 86), isohexane (molecular weight 86), cyclohexane (molecular weight 84), n-octane (molecular weight 114), isooctane (molecular weight 114), n-nonane (molecular weight 128), n-decane (molecular weight 142), isododecane (molecular weight 170), tetradecane (molecular weight 198), hexadecane (molecular weight 227), and heptadecane (molecular weight 241). Among these, ethyl acetate, butyl acetate, and isododecane are preferred from the viewpoint of film formation speed, nail surface irregularity correction effect, and smooth spreadability, with ethyl acetate and butyl acetate being more preferred, and ethyl acetate being even more preferred. Among the hydrophobic organic solvents of component (A), volatile oils with a molecular weight of 300 or less are included in component (B) of the present invention.

[0034] The molecular weight of component (B) used in the present invention is preferably 180 or less, more preferably 120 or less, and even more preferably 90 or less, from the viewpoint of oil resistance, speed of film formation, effect of correcting nail irregularities, and smooth spreading.

[0035] The content of component (B) used in the present invention, relative to the total amount of the nail beautifying agent, is preferably 10% or more at the lower limit, more preferably 20% or more, and even more preferably 30% or more. At the upper limit, it is preferably 60% or less, more preferably 50% or less, and even more preferably 45% or less. Within the range, it is preferably 10-60%, more preferably 20-50%, and even more preferably 30-45%.

[0036] Component (C) used in the present invention is an organically modified clay mineral. Component (C) is obtained by substituting the interlayer metal ions of the clay mineral with a cationic modifier such as a quaternary alkylammonium ion. The clay mineral used in the present invention is not particularly limited, but examples include smectite-type clays such as bentonite, montmorillonite, beidelite, hectorite, and saponite, and fluorine-introduced swelling mica.

[0037] There are no particular limitations on the method for modifying clay minerals with cations, but examples include adding a quaternary alkylammonium salt to a suspension of clay minerals dispersed in water and mixing thoroughly, or adding a clay mineral suspension to a quaternary alkylammonium salt solution and mixing thoroughly. The modification reaction proceeds sufficiently at room temperature, but heating may be added if necessary. The maximum temperature when heating is used is determined by the heat resistance of the quaternary alkylammonium salt used and can be set arbitrarily as long as it is below its decomposition point. The solid and liquid are then separated, and the product is washed with water to thoroughly remove by-product electrolytes. This can then be dried and, if necessary, pulverized before use.

[0038] As for component (C) used in the present invention, stearalkonium hectorite and stearalkonium bentonite are preferred from the viewpoint of correcting the unevenness of the nail, and stearalkonium hectorite is more preferred.

[0039] Examples of commercially available components (C) used in the present invention include BENTONE 27V (manufactured by Elementis Japan), which is stearalkonium hectorite; MP250 (manufactured by BYK Additives & Instrumentals), which is stearalkonium bentonite; and BENTONE 38V CG (manufactured by Elementis Japan), which is disteardimonium hectorite. One or more of these can be used.

[0040] The content of component (C) used in the present invention, relative to the total amount of the nail beautifying agent, is preferably 1% or more at the lower limit, more preferably 2% or more, and even more preferably 3% or more. At the upper limit, it is preferably 12% or less, more preferably 8% or less, and even more preferably 7% or less. Within the range, it is preferably 1 to 12%, more preferably 2 to 8%, and even more preferably 3 to 7%.

[0041] The present invention may further contain component (D) nitrocellulose. Component (D) is a type of cellulose derivative. In the present invention, the speed of film formation and the effect of correcting nail irregularities are further improved.

[0042] Examples of commercially available products include nitrate cotton H1 / 2, nitrate cotton H1 / 4, nitrate cotton L1 / 2, and nitrate cotton L1 / 4 (all manufactured by Asahi Kasei Corporation).

[0043] The content of component (D) used in the present invention, relative to the total amount of the nail beautifying agent, is preferably 0.3% or more at the lower limit, more preferably 1% or more, and even more preferably 3% or more, from the viewpoint of the speed of film formation and the effect of correcting unevenness of the nails. The upper limit is preferably 15% or less, more preferably 12% or less, and even more preferably 10% or less. The range is preferably 0.3 to 15%, more preferably 1 to 12%, and even more preferably 3 to 10%.

[0044] The mass ratio (A) / (B) of the content of component (A) to the content of component (B) used in the present invention is preferably 0.005 or higher as a lower limit, more preferably 0.015 or higher, and even more preferably 0.03 or higher, from the viewpoint of oil resistance, speed of film formation, effect of correcting nail irregularities, and smooth spreading. The upper limit is preferably 0.2 or lower, more preferably 0.125 or lower, and even more preferably 0.1 or lower. The range is preferably 0.005 to 0.2, more preferably 0.015 to 0.125, and even more preferably 0.03 to 0.1.

[0045] The mass ratio (A) / (C) of the content of component (A) to the content of component (C) used in the present invention is preferably 0.04 or higher as a lower limit, more preferably 0.12 or higher, and even more preferably 0.17 or higher, from the viewpoint of oil resistance, speed of film formation, effect of correcting unevenness of the nail, and smooth spreading. The upper limit is preferably 2 or lower, more preferably 1 or lower, and even more preferably 0.6 or lower. The range is preferably 0.04 to 2, more preferably 0.12 to 1, and even more preferably 0.17 to 0.6.

[0046] The mass ratio (B) / (C) of the content of component (B) to the content of component (C) used in the present invention is preferably 2 or more, more preferably 4 or more, and even more preferably 5 or more, from the viewpoint of oil resistance, speed of film formation, effect of correcting nail irregularities, and smooth spreading. The upper limit is preferably 50 or less, more preferably 25 or less, and even more preferably 12 or less. The range is preferably 2 to 50, more preferably 4 to 25, and even more preferably 5 to 12.

[0047] The mass ratio (A) / (D) of the content of component (A) to the content of component (D) used in the present invention is preferably 0.033 or higher as a lower limit, more preferably 0.1 or higher, and more preferably 0.83 or lower as an upper limit, more preferably 0.5 or lower as an upper limit, and more preferably 0.033 to 0.83 as a range, more preferably 0.1 to 0.5 as a range.

[0048] The mass ratio of the content of component (C) to the total content of component (A) and component (B) used in the present invention, (C) / {(A)+(B)}, is not particularly limited, but from the viewpoint of oil resistance, speed of film formation, effect of correcting nail irregularities, and smooth spreading, the lower limit is preferably 0.02 or higher, more preferably 0.05 or higher, and even more preferably 0.08 or higher. The upper limit is preferably 0.42 or lower, more preferably 0.29 or lower, and even more preferably 0.23 or lower. The range is preferably 0.02 to 0.42, more preferably 0.05 to 0.29, and even more preferably 0.08 to 0.23.

[0049] In addition to the above-mentioned components (A) to (D), the nail care product of the present invention may appropriately contain components commonly used in cosmetics, such as oily components other than components (A) and (B), powdery components other than component (C), surfactants, UV absorbers, moisturizers, color-fastening agents, antioxidants, defoaming agents, beauty ingredients, preservatives, fragrances, etc., to the extent that they do not impair the effects of the present invention.

[0050] Other oily components besides components (A) and (B) are not particularly limited as long as they are commonly used in cosmetics, and any of them can be used. For example, regardless of their origin (animal oil, vegetable oil, synthetic oil, etc.) or properties (wax, solid oil, semi-solid oil, liquid oil, etc.), examples include hydrocarbon oils, fats and oils, hydrogenated oils, ester oils, fatty acids, higher alcohols, silicone oils, fluorinated oils, lanolin derivatives, amino acid oils, etc. Specifically, these include hydrocarbon oils such as liquid paraffin, squalane, polyisobutylene, polybutene, petrolatum, polyethylene, polypropylene, ethylene-propylene copolymer, synthetic wax, and microcrystalline wax; oils and fats such as shea butter, olive oil, castor oil, mink oil, macadamia nut oil, candelilla wax, carnauba wax, and rice wax; sucrose benzoate, sucrose acetate butyrate, acetyl tributyl citrate, jojoba oil, cetyl 2-ethylhexanoate, isostearyl lactate, octyldodecyl lactate, oleyl lactate, stearyl lactate, diisostearyl malate, tridecyl trimellitate, isopropyl myristate, isopropyl palmitate, octyldodecyl myristate, pentaerythritol ethylhexanoate, dipentaerythritol tetraisostearate, neopentyl glycol dioctanoate, and dioctanoate. Examples of suitable oils include ester oils such as pentyl glycol, cholesterol fatty acid esters, and phytosterol fatty acid esters; fatty acids such as stearic acid, lauric acid, myristic acid, behenic acid, isostearic acid, and oleic acid; higher alcohols such as octyldodecanol, decyltetradecanol, stearyl alcohol, cetyl alcohol, lauryl alcohol, oleyl alcohol, isostearyl alcohol, and behenyl alcohol; fluorinated oils such as perfluorodecane, perfluorooctane, and perfluoropolyether; silicone oils such as dimethylpolysiloxane and phenyl-modified silicone; lanolin derivatives such as lanolin, lanolin acetate, isopropyl lanolin fatty acid, and lanolin alcohol; and amino acid-based oils such as di(phytosteryl / octyldodecyl) lauroyl glutamate and isopropyl laurolyl sarcosinate. One or more of these can be used.

[0051] Other powders besides component (C) are not particularly limited in terms of shape (plate-like, spindle-like, needle-like, etc.), particle size (fine particles, pigment-grade, etc.), particle structure (porous, non-porous, etc.), etc., and include inorganic powders, organic powders, composite powders, etc. Specifically, examples include inorganic powders such as titanium dioxide, black titanium dioxide, ultramarine, red iron oxide, yellow iron oxide, black iron oxide, zinc oxide, aluminum oxide, anhydrous silicic acid, magnesium oxide, zirconium oxide, magnesium carbonate, calcium carbonate, chromium oxide, chromium hydroxide, carbon black, aluminum silicate, magnesium silicate, aluminum magnesium silicate, mica, synthetic mica, talc, silicon carbide, barium sulfate, boron nitride, etc.; organic powders such as magnesium stearate, zinc stearate, N-acyllysine, cellulose, starch, silk, etc.; composite powders such as fine-particle titanium dioxide-containing silicon dioxide and fine-particle zinc oxide-containing silicon dioxide; lustrous powders; pigments, etc., and one or more of these can be used. Furthermore, the surface may be coated with a surface treatment agent. Specifically, the surface treatment agent may be one obtained by known methods using inorganic substances such as silica and alumina, or organic substances such as triethoxyalkylsilane, organic titanate, N-acyl amino acids, amino acids, phospholipids, silicones, metallic soaps, surfactants, oils, or hydrocarbons. In addition, one or more surface treatment agents may be used for coating.

[0052] The lustrous powder is not particularly limited as long as it is commonly used in cosmetics. Specifically, it includes bismuth oxychloride, titanium dioxide-coated bismuth oxychloride, titanium mica, organic pigment-treated titanium mica, iron oxide titanium mica, Prussian blue-treated titanium mica, carmine-treated titanium mica, fish scale foil, titanium dioxide-coated borosilicate (Ca / Al), iron oxide-coated borosilicate (Ca / Al), silver-coated borosilicate (Ca / Al), metal or metal oxide-coated borosilicate (Ca / Titanium), titanium dioxide-coated borosilicate (Ca / Sodium), and metal or metal oxide-coated borosilicate (Ca / Na). Examples of such materials include metal oxide-coated synthetic fluorophlogopites such as titanium dioxide-coated synthetic fluorophlogopites and iron oxide-coated synthetic fluorophlogopites; resin laminated powders such as polyethylene terephthalate-aluminum-epoxy laminated powder, polyethylene terephthalate laminated powder, polyethylene terephthalate-aluminum laminated powder, polyethylene terephthalate-polyolefin laminated film powder, and polyethylene terephthalate-polymethyl methacrylate laminated film powder; and metal powders such as aluminum powder, gold powder, and silver powder. One or more of these can be used.

[0053] As for the pigments, there are no particular restrictions as long as they are pigments commonly used in cosmetics. For example, metal oxides such as titanium dioxide, zinc oxide, cerium oxide, iron oxide, titanium / titanium oxide sinter, chromium oxide, chromium hydroxide, Prussian blue, ultramarine, etc., as well as organic pigment powders such as Red 201, Red 202, Red 205, Red 226, Red 228, Orange 203, Orange 204, Blue 404, Yellow 401, Black 401, Brown 201, Purple 401, Blue 1, Blue 2, Blue 203, Blue 205, Green 3, Green 201, Green 204, Green 20 Examples of organic dyes include zirconium, barium, or aluminum lake, such as No. 5, Green No. 401, Green No. 402, Yellow No. 4, Yellow No. 5, Yellow No. 202 (1), Yellow No. 202 (2), Yellow No. 203, Yellow No. 402, Yellow No. 403 (1), Yellow No. 406, Yellow No. 407, Orange No. 205, Orange No. 402, Red No. 2, Red No. 3, Red No. 102, Red No. 104 (1), Red No. 105 (1), Red No. 106, Red No. 227, Red No. 230 (1), Red No. 231, Red No. 401, Red No. 502, Red No. 503, Red No. 504, and Red No. 506.

[0054] Any surfactant commonly used in cosmetics can be used, including nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants.

[0055] Examples of UV absorbers include ethylhexyl methoxycinnamate, ethylhexyl salicylate, dimethyldiethyl benzalmalonate, diethylaminohydroxybenzoyl hexyl benzoate, methylenebisbenzotriazolyltetramethylbutylphenol, 2,4-bis{[4-(2-ethylhexyloxy)-2-hydroxy]-phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine, 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine, octocrylene, and 4-tert-butyl-4'-methoxydibenzoylmethane.

[0056] Examples of moisturizers include polyhydric alcohols, proteins, mucopolysaccharides, collagen, elastin, and keratin.

[0057] Examples of antioxidants include α-tocopherol and ascorbic acid.

[0058] Examples of beauty ingredients include vitamins, anti-inflammatory agents, and herbal medicines.

[0059] Examples of preservatives include parahydroxybenzoic acid esters, phenoxyethanol, 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol, and ethylhexylglycerin.

[0060] As for fragrances, there are no particular restrictions as long as they are fragrances commonly used in cosmetics. Examples include limonene, linalool, lavender flower extract, menthol, perillaldehyde, phenethyl alcohol, farnesol, pinene, citronellol, citral, methyl salicylate, geraniol, eugenol, and β-caryophyllene.

[0061] The method for producing the nail beautifying agent of the present invention is not particularly limited and can be obtained by general methods. For example, it can be obtained by uniformly mixing and dispersing components (A), (B), (C), and optionally component (D) and other components, and filling them into a container. The components may be mixed simultaneously, or other components may be added during the mixing process.

[0062] The formulation of the nail care product of the present invention is not particularly limited, and examples include oil-based, water-in-oil, and oil-in-water formulations, with the oil-based form being particularly preferred. The properties are also not particularly limited, and examples include liquid and cream forms. The items are not particularly limited, and examples include nail polish, base coat, top coat, nail care coat, and nail oil.

[0063] Furthermore, the present invention may include the following inventions. [1] The following components (A) to (C); (A) A polyorganosiloxane having a block structure, represented by the following general formula (1), having a weight-average molecular weight of 500,000 or more, and being a solid at room temperature in the absence of solvent with a softening point of 50°C or higher. [ka] (In the formula, R 1 , R 2 , R 3 , R 4 , R 5 is a saturated or unsaturated hydrocarbon group having 1 to 20 carbon atoms, which may have hydrogen atoms or substituents; m represents the number of repeating diorganosiloxy units, where 50≧m≧0; a, b, c, d, and e represent the molar ratios of their respective siloxane units, where 0.3≧a≧0, 0.2≧b>0, 0.5≧c≧0, 0.95≧d>0.5, 0.3≧e≧0, and a+b×(2+m)+c+d+e=1; and x and y represent the number of hydroxyl or alkoxy groups bonded to 1 mole of Si atoms in the siloxane units a-e, where 0.1≧x>0 and 0.1≧y>0. (B) Volatile oils with a molecular weight of 300 or less (C) Organically modified clay minerals A nail care product containing [specific ingredient]. [2] The nail beautifying agent according to [1], wherein the mass ratio (A) / (B) of the content of component (A) to the content of component (B) is 0.005 to 0.2. [3] The nail care product according to [1] or [2], wherein the mass ratio of the content of component (A) to the content of component (C), (A) / (C), is 0.04 to 2. [4] The nail care product according to any one of [1] to [3], wherein the component (B) is a volatile oil with a molecular weight of 180 or less. [5] A nail care product according to any of [1] to [4], further containing ingredient (D) nitrocellulose. [6] The nail beautifying agent according to [5], wherein the mass ratio (A) / (D) of the content of component (A) to the content of component (D) is 0.033 to 0.83. [Examples]

[0064] The present invention will be described in detail below with reference to manufacturing examples and embodiments, but the present invention is not limited to these. The apparatus used in the embodiments is as follows. Unless otherwise specified, "parts" and "%" refer to "parts by mass" and "mass%", respectively.

[0065] (1) GPC measurement conditions Equipment: HLC-8320GPC manufactured by Tosoh Corporation Developing solvent: Tetrahydrofuran (THF) Flow rate: 0.5mL / min Detector: Differential refractive index detector (RI) Columns: Use two of the following columns directly connected together. TSKgel GMHHR-H(30)(7.8mmI.D.×30cm×1) (Manufactured by Tosoh Corporation) Column temperature: 40℃ Sample injection volume: 200 μL (THF solution with a concentration of 20 g / L) Standard: Monodisperse polystyrene (2) Silicon nuclear magnetic resonance spectrum ( 29 Si-NMR) measurement conditions Equipment: 300MHz-NMR manufactured by JEOL Ltd. Solvent: CDCl3 Sample concentration: 20% Internal standard: Tetramethylsilane (TMS)

[0066] In the following, the kinematic viscosity of the product was measured at 25°C using a Cannon-Fenske viscometer according to the method described in JIS Z 8803:2011. The content of silanol hydroxyl groups in the product (mass%), hereinafter referred to as silanol content, was quantified from the amount of methane gas generated when the product was reacted with a Grignard reagent (methylmagnesium iodide).

[0067] Manufacturing Example 1 [Synthesis of polyorganosiloxanes with block structures] 2700 g of deionized water, 400 g of isobutanol, and 300 g of heptane were charged into a 5 L three-necked flask equipped with a stirrer, condenser, dropping funnel, and thermometer, and stirred. A mixture of 650 g (4.3 mol) of methyltrichlorosilane (at 25°C), 70 g (0.9 mol Si equivalent) of α,ω-dimethylchlorosiloxypolydimethylsiloxane (formula 3 below), and 300 g of heptane was added dropwise over 2 hours while controlling the internal temperature to prevent it from exceeding 40°C. After the addition was complete, the aqueous hydrochloric acid phase, in which hydrogen chloride generated by the hydrolysis of the chlorosilyl group dissolved in the deionized water, was separated from the organic phase. This organic phase was washed multiple times with saline solution until the water-wash phase became neutral. The resulting organic phase had a kinematic viscosity of 2.7 mm². 2 The organic solution contained an organosiloxane with a molecular weight of approximately 7600, measured by GPC, and had a non-volatile residue of 33% under drying conditions of 105°C for 3 hours. 20 g of concentrated hydrochloric acid was added to this organic solution, and a condensation polymerization reaction was carried out by heating at 60°C for 3 hours. Subsequently, heptane was added to adjust the concentration to a drying residue of 20%. After washing multiple times with saline solution until the water washing phase was neutral, 0.03% citric acid was added to the organic solution and dissolved to obtain an organic solution in which the polyorganosiloxane with the desired block structure was dissolved in an organic solvent. This organic solution had a kinematic viscosity of 14.4 mm². 2 Under drying conditions of 105°C for 3 hours at 1 / s, the non-volatile residue was 21%, and the weight-average molecular weight measured by GPC was approximately 1.43 million. 29 Si-NMR measurements revealed signals attributed to diorganosiloxane units (D units) in the range of -16 to -23 ppm, with a detection width of 5 ppm for the main signal peak. The resulting compound was a polyorganosiloxane composed of D and T units. Furthermore, it was confirmed that the polyorganosiloxane with the above block structure is solid at room temperature in the absence of solvent, and that its softening point is above 50°C.

[0068] [ka]

[0069] Manufacturing Example 2 [Synthesis of polyorganosiloxanes with block structures] A polyorganosiloxane with a block structure and a weight-average molecular weight of 3.1 million was obtained in the same manner as in Production Example 1, except that the condensation polymerization reaction conditions were changed to 60°C for 4 hours. The obtained synthesis was a polyorganosiloxane composed of D units and T units. It was confirmed that the above polyorganosiloxane with a block structure is solid at room temperature in the absence of solvent, and that its softening point is 50°C or higher.

[0070] Manufacturing Example 3 To 500 g of the polysiloxane solution with a 20% dry residue obtained in Production Example 1, 16 g (0.16 mol) of triethylamine and 13 g (0.12 mol) of trimethylchlorosilane were added, and the mixture was heated at 60°C for 3 hours to carry out the trimethylsiloxylation reaction of the silanol in the polysiloxane. Subsequently, the mixture was washed multiple times with saline solution until the water washing phase became neutral, yielding an organic solution in which a polyorganosiloxane with a weight-average molecular weight of 1.56 million and a trimethylsiloxy-bound, block structure was dissolved in an organic solvent. The resulting compound was a polyorganosiloxane composed of M units, D units, and T units. It was confirmed that the polyorganosiloxane with the block structure described above is solid at room temperature in the absence of solvent, and that its softening point is above 50°C.

[0071] Examples 1-19 and Comparative Examples 1-3: Nail beautifying agents Nail polishes with the compositions shown in Tables 1 and 2 were manufactured using the following manufacturing methods, and each sample was evaluated using the following evaluation methods. The results are also shown in Tables 1 and 2. For component (A), the synthetic product obtained in Manufacturing Example 1 or 2 was dried with a spray dryer to obtain a solid, and then dissolved in 80 parts isododecane with 20 parts of the solid. This was used as the DT resin (20% solid content) for Manufacturing Example 1 or 2. The synthetic product obtained in Manufacturing Example 3 was dried with a spray dryer to obtain a solid, and then dissolved in 70 parts isododecane with 30 parts of the solid. This was used as the MDT resin (30% solid content) for Manufacturing Example 3.

[0072] [Table 1]

[0073] [Table 2] *1 Nitrocellulose H1 / 2 (manufactured by Asahi Kasei Corporation) *2 SR-1000 (manufactured by Momentive Performance Materials) *3 BENTONE 27V (manufactured by Elementis Japan) *4 MP250 (manufactured by BYK Additives & Instrumentals) *5 AEROSIL 300 (manufactured by Nippon Aerosil Co., Ltd.)

[0074] [Manufacturing method] Mixes No. 1-15 in an open disperser for 10 minutes and then fill into a glass container with a brush.

[0075] 〔evaluation〕 Oil resistance: 20 ml of dimethicone (KF-96-2cs, manufactured by Shin-Etsu Chemical Co., Ltd.) was placed in a standard bottle (height 58 mm, body diameter 31.5 mm). After applying each sample, a nail tip (ABS resin) was placed in the same standard bottle 10 minutes later and stirred with a paint shaker (YS-8D, manufactured by Yayoi Co., Ltd.) at a stroke rate of 60 strokes / minute and stroke width of 80 mm. After 5 minutes, the degree to which each sample fell was observed and evaluated and judged according to the following four-stage evaluation criteria. 4-stage evaluation criteria (oil resistance test) (Judgment): <Evaluation Criteria> ◎: No peeling (removal of the cosmetic film) is observed at all. ○: There is a change in the cosmetic film, but there is no peeling. △: Some peeling is visible. ×: To become "peeled off" Sensory evaluation method: Twenty cosmetic evaluation specialists were asked to use the cosmetic products of the above examples and comparative examples. Each member evaluated the "speed of film formation," "effect of correcting nail irregularities," and "smooth spreadability" on a 5-point scale according to the following criteria, assigning a score to each nail care product. Furthermore, the average score of all panel members was determined according to the following criteria. <Evaluation Criteria> (Evaluation result): (Score) Very good: 5 points Good: 4 points Average: 3 points Slightly poor: 2 points Defective: 1 point <Judgment criteria> (Average score): (Judgment) 4 points or more: ◎ 3.5 points or more but less than 4 points: ○ 2 points or more but less than 3.5 points: △ Less than 2 points: × Furthermore, a higher score indicates a better performance.

[0076] The nail beautifying agents of Examples 1 to 19 exhibited excellent smooth spreading and rapid film formation upon application, good nail surface irregularity correction after film formation, and good oil resistance, due to the synergistic effect of components (A) DT resin or MDT resin, (B) volatile oil with a molecular weight of 300 or less, and (C) organically modified clay mineral. On the other hand, Comparative Example 1, which did not contain component (A), did not yield satisfactory results in terms of rapid film formation, smooth spreading, and nail surface irregularity correction. Furthermore, Comparative Example 2, which contained trimethylsiloxysilicate instead of component (A), did not yield satisfactory results in terms of oil resistance, rapid film formation, and smooth spreading. In addition, Comparative Example 3, which contained fuzzy silica instead of component (C), did not yield satisfactory results in terms of rapid film formation, smooth spreading, and nail surface irregularity correction.

[0077] Example 20: Manicure (Ingredients) (%) 1. MDT resin (30% solids content) from manufacturing example 3 10 2. Nitrocellulose*1 15 3. Stearalkonium hectorite*3 4 4. Isopropyl alcohol 5 5. Ethyl acetate (molecular weight 88) 30 6. Butyl acetate (molecular weight 116) 10 7. Butanol remaining amount 8. Heptane 2 9. 3% (Polyglyceryl-2 Triisostearate-treated) Red No. 202 0.2 10.3% (Polyglyceryl-2 Triisostearate-treated) Yellow No. 4 0.2 11.3% (Polyglyceryl-2 treated triisostearate) Titanium Dioxide 1 12.3% (Polyglyceryl-2 treated triisostearate) Black iron oxide 0.1 13.3% (silicone-treated) titanium mica (average particle size 40 μm) 5 14. Plate-shaped polylactic acid powder (average particle size 20 μm) 2 15. Aluminum powder (average particle size 20 μm) 2 16.2% (silica-treated) borosilicate (Ca / Al) 2 17. Oxybenzone-3 0.5

[0078] (Manufacturing method) Ingredients (1) to (17) were mixed in an open disperser for 10 minutes and then filled into a glass container with a brush.

[0079] The nail polish obtained as described above exhibits smooth application, excellent film formation speed, good nail surface irregularity correction effect after film formation, and good oil resistance, resulting in a nail beautifying agent.

[0080] Example 21: Top Coat (Ingredients) (%) 1. DT resin (20% solids content) from manufacturing example 1 4 2. MDT resin (30% solids content) from manufacturing example 3 5 3. Trimethylsiloxysilicate*2 2 4. Isopropyl alcohol remaining amount 5. Ethyl acetate (molecular weight 88) 30 6. Butyl acetate (molecular weight 116) 10 7. (Acrylates / Dimethicone) Copolymer 2 8. Sucrose benzoate 5 9. Dextrin isostearate 2.2 10. Camphor 1 11. Ethylhexyl salicylate 0.5 12. Lecithin 0.3 13. Squalane 0.5 14. Baobab seed oil 0.1 15. Acetyl tributyl citrate 2 16. Tocopherol 0.1 17. Stearalkonium hectorite*3 1

[0081] (Manufacturing method) Ingredients (1) to (17) were mixed in an open disperser for 10 minutes and then filled into a glass container with a brush.

[0082] The top coat obtained as described above exhibits smooth application and rapid film formation, good nail surface irregularity correction after film formation, and good oil resistance, resulting in a nail beautifying agent.

[0083] Example 22: Base Coat (Ingredients) (%) 1. MDT resin (30% solids content) from manufacturing example 3 10 2. (Styrene / Acrylates) Copolymer 5 3. Isopropyl alcohol remaining amount 4. Ethyl acetate (molecular weight 88) 30 5. Butyl acetate (molecular weight 116) 10 6. Stearalkonium hectorite*3 4.5 7. Acetyl tributyl citrate 5 8. Anhydrous silicic acid 1 9. Bengara (red iron oxide pigment) 0.05 10. Yellow iron oxide 0.05 11. (Phthalic anhydride / benzoic acid / glycerin) copolymer 2 12. (Tosylamide / Epoxy) Resin 1 13. Mineral oil 0.1 14. Ethylhexyl Methoxycinnamate 0.5 15. Malic acid 0.01

[0084] (Manufacturing method) Ingredients (1) to (15) were mixed in an open disperser for 10 minutes and then filled into a glass container with a brush.

[0085] The base coat obtained as described above exhibits smooth spreadability during application, excellent film formation speed, good nail surface irregularity correction effect after film formation, and good oil resistance, resulting in a nail beautifying agent.

[0086] Example 23: Nail Care Coat (Ingredients) (%) 1. MDT resin (30% solids content) from manufacturing example 3 11 2. Nitrocellulose*1 3 3. Isopropyl alcohol remaining amount 4. Ethyl acetate (molecular weight 88) 35 5. Mineral oil 3 6. Polyglyceryl-2 Triisostearate 3 7. Glyceryl tri-2-ethylhexanoate 2 8. Glycerin 1 9. Butanol 2 10.Fragrance 0.1 11. Argan oil 0.1 12. Lavender oil 0.05 13. Camellia oil 0.05 14. Panthenol 0.01 15. Rosehip extract 0.01 16. Squalane 0.01 17. Meadowfoam oil 0.01 18. Almond oil 0.01 19. Avocado oil 0.01 20. Stearalkonium hectorite*3 3.9

[0087] (Manufacturing method) Ingredients (1) to (20) were mixed in an open disperser for 10 minutes and then filled into a glass container with a brush.

[0088] The nail care coat obtained as described above exhibits smooth application, excellent film formation speed, good nail surface irregularity correction effect after film formation, and good oil resistance, resulting in a nail beautifying agent.

Claims

1. The following components (A) to (C): (A) A polyorganosiloxane having a block structure, represented by the following general formula (1), having a weight-average molecular weight of 500,000 or more, and being a solid at room temperature in the absence of solvent with a softening point of 50°C or higher. 【Chemistry 1】 (In the formula, R １ , R ２ , R ３ , R ４ , R ５ (where is a saturated or unsaturated hydrocarbon group having 1 to 20 carbon atoms, which may have hydrogen atoms or substituents; m represents the number of repeating diorganosiloxy units, where 50 ≥ m ≥ 0; a, b, c, d, and e represent the molar ratios of their respective siloxane units, where 0.3 ≥ a ≥ 0, 0.2 ≥ b > 0, 0.5 ≥ c ≥ 0, 0.95 ≥ d > 0.5, 0.3 ≥ e ≥ 0, and a + b × (2 + m) + c + d + e = 1; and x and y represent the number of hydroxyl or alkoxy groups bonded to 1 mole of Si atoms in the siloxane units a to e, where 0.1 ≥ x > 0 and 0.1 ≥ y > 0.) (B) Volatile oils with a molecular weight of 300 or less (C) Organically modified clay minerals A nail care product containing [specific ingredient].

2. The nail beautifying agent according to claim 1, wherein the mass ratio (A) / (B) of the content of component (A) to the content of component (B) is 0.005 to 0.

2.

3. The nail beautifying agent according to claim 1 or 2, wherein the mass ratio (A) / (C) of the content of component (A) to the content of component (C) is 0.04 to 2.

4. The nail care product according to claim 1 or 2, wherein the component (B) is a volatile oil with a molecular weight of 180 or less.

5. The nail beautifying agent according to claim 1 or 2, further containing ingredient (D) nitrocellulose.

6. The nail beautifying agent according to claim 5, wherein the mass ratio (A) / (D) of the content of component (A) to the content of component (D) is 0.033 to 0.83.

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